Padlock.



A. H. PEGK 82; E. J. SHIPMAN.

PADLOGK.

APPLICATION FILED JULY 11, 1911.

1,051,442, Patented Jan. 28, 1913.

WITNESSES: 1N VENTORS.

' f BY WFMQ A TTORNEK ogumlu ruriomiuu cumumuu'ron, n. c.

- ment by means of a STATES PATENT OFFICE.

ARCI-IIBALD H. PECK AND EVAN J. SHIPIVIAN, OF NEW HAVEN, CONNECTICUT,

ASSIGNORS TO SARGENT 86 COMPANY, OF NEW HAVEN, CONNECTICUT, A COR- PORATION OF CONNECTICUT.

PADLOCK.

To alt whom it may concern:

Be it known that we, ARcHIBALD H. Pncx and EVAN J. SHIPMAN, both of the city and county of New Haven and State of Connecticut, have invented new. and useful Improvements in Padlocks, of which the following is a full, clear, and exact description when taken in connection with the accompanying drawings, which form a part thereof.

Our invention relates to padlocks, and its object is to provide means auxiliary to the main locking means for locking the shackle, whereby a more durable device is obtained, and safety means provided such as will prevent a release of the shackle by picking the main locking means.

"With these ends and others in view, our invention is embodied in preferable form in the device hereinafter described and illustrated in the accompanying drawings in which like reference characters denote the same parts throughout the several views and in which,

Figure 1 is an outside plan view of a padlock embodying our invention; Fig. 2, a similar view with cap plate removed and shackle locked; Fig. 3, a view similar to Fig. 2, with shackle open; Fig. 4, a view similar to Fig. 3 with auxiliary locking member removed; and Fig. 5, a plan view of the key employed for the padlock.

Referring to the drawings, the casing 1 of the usual construction is provided with the customary capplate 2, and between these parts a shackle 3 is pivoted on a pivot pin 3 The shackle is provided at its free end with a catch 4 cooperating with a catch lug 5 on a pivoted tumbler 6. This tumbler is provided with an arm 7 pivoted at one extremity on a pin 8 in the casing, the tunibler being guided and limited in its movein 10 projecting from the back of the caslng into a slot 9 with which said tumbler is provided. The catch lug 5 is located at that extremity of the arm 7 which is opposite the pivot pin, and said catch lug is normally urged into engagement with the shackle catch 4 by means of a spring 11 having an arm 12 engaged with the lug 5. This spring is bent around the pin or post 8 in such a manner as to present a second arm 13 which is continued around the pin or post 10 to form a third arm 14 coacting with a nose 15 at the pivoted end of Specification of Letters Patent.

Application filed July 11, 1911.

Patented Jan. 28,1913.

Serial No. 637,890.

the shackle. The arm 12 of the spring 11 urges the lug 5 toward the catch 4, while the arm 14 of said spring urges the shackle into its open position, as shown in Figs. 3 and 4. As the shackle moves into open positlon, upon the actuation of the tumbler 6, the spring arm 14 moves into a notch 15 in the heel of the shackle, as shown. The tumbler 6 is actuated by means of a key 18, adapted to be inserted in the keyhole 19 and bitted to engage talons 17 on an arm or extension 16 directed laterally from the free end of the tumbler. The pivot or post 8 of the main tumbler 6 also serves to mount an auxiliary tumbler 20 which, however, instead of cooperating with the free end of the shackle, cooperates with the pivoted end thereof. This tumbler 20 is limited in its movement by having one edge 21 positioned to abut the pin 10. The cooperation of this last named tumbler with the pivoted end of the shackle is effected by providing the tumbler with a tail piece or extension 22, having a lug or catch 23 at its extremity adapted-to cooperate with the heel portion of the shackle. In the embodiment illustrated, the lug 23 of the tumbler 20 is arranged to enter a notch 24 formed by projections or shoulders 24, 25 on the shackle heel. This notch 24 is located at that side of the shackle pivot 3 which is opposite the free end of the shackle, and therefore when the lug 23 is engaged with the notch 24, as shown in Fig. 2, the tumbler 20 will effectively prevent any opening movement of the shackle even if the tumbler 6 is displaced by picking, or otherwise.

The tumbler 20 is actuated by the key 18 through the intermediary of talons 28 formed on an arm 27, and overlying the talons 17 of the main tumbler 6. A spring 26 of customary form normally urges the stop arm 22 of the auxiliary tumbler in an upward direction to engage the notch 24*.

In unlocking the padlock, a properly bittcd key such as the key 18, when rotated in the proper direction in the keyhole, will pass a fixed ward 29 in front of the talons 17 and 28 and will thereupon engage said talons. This will cause the respective tumblers to be rotated on their common pivot, retracting the catch lug 5 from the catch 4 and retracting the lug 23 from the notch the arm 14 of the spring 11, said arm moving from the extremity of the nose 15 into the notch 15*, as previously described. When the shackle is forced inward to relock the device, the catch 4 will take over the catch lug on the main tumbler 6, and the projection 25 on the heel of the shackle will ride along the upper edge of the stop arm 22 until the lug 23 of the auxiliary tumbler drops into the notch 2% in the shackle heel. In this position of the parts, the shackle will be firmly locked in place by the engagement therewith of the separate tumblers acting at opposite sides of the shackle pivot. Hence the padlock will be efi'ective even if one of the tumbler springs is broken, and even it a thief or other person succeeds in actuating one of the tumblers.

lVithout limiting ourselves to the construction shown, we claim 1. In a padlock, a pivoted shackle, pivoted tumblers cooperating with opposite ends of the shackle respectively, and a stop pin passing through a slot in one of said tumblers and coacting with the edge of the other tumbler; substantially as described.

2. In a padlock, a pivoted shackle, tumblers cooperating with opposite ends of said shackle respectively, a stop pin passing through a slot in one tumbler and cooperating with a side edge of the other tumbler, and a spring reacting against said stop pin and urging one of said tumblers into locking position, and urging the shackle into open position; substantially as described.

3. In a padlock, a pivoted shackle having acatch at one end and a heel at the opposite end, a tumbler cooperating with the catch of said shackle, a pin on which said tumbler is pivoted, a second pin forming a stop for said tumbler, and a single spring reacting against said pins and having a portion engaged with said tumbler to urge it into engagement with the catch of the shackle, and having another portion cooperating with the heel of the shackle and urging the shackle into its open position; substantially as described.

4. In a padlock, a pivoted shackle having a heel at the pivoted end and a catch at the free end, a tumbler arranged to engage said catch, a second tumbler arranged to engage said heel, a common pivot for said tumblers, and a spring supported against said pivot and having a portion urging said first tum bler into engagement with the catch end of the shackle; substantially as described.

5. In a padlock, a pivoted shackle having a catch at the free end and a heel at the pivoted end, a tumbler to engage said catch, a second tumbler to engage said heel, a common pin on which said tumblers are pivo-ted, a common stop pin for said tumblers, and a spring reacting against said pins and having one portion urging the first tumbler into engagement with the catch, and having another portion engaging the shackle heel and urging the shackle into open position; substantially as described.

6. In a padlock, the combination of a shackle, tumblers cooperating with opposite ends of the shackle respectively, and a common stop pin for said tumblers; substantially as described.

7. In a padlock, the combination of a shackle, a tumbler to engage one end of the shackle, a second tumbler to engage the other end of said shackle, a common stop pin for said tumblers, and a spring supported against said pin and acting on the shackle to hold it normally in open position; substantially as described.

In witness whereof we have hereunto set our hands on the 7th day of July, 1911.

ARGHIBALD H. PECK. EVAN J. SHIPMAN.

\Vitnesses MAY L. OCoNNon, HENRY B. SARGENT. v

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

